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UDONGEIN X

Help Reisen Udongein Inaba navigate through 14 action packed stages in this exhilarating 2D Bullet Hell Platformer based on Touhou Project!

Steam Page
Developer
Bar Holographic Otaku
Publisher
Bar Holographic Otaku, 东游鉴
Release
December 3, 2021
4 years and 243 days ago
Steam Reviews
Very Positive458 reviews92.1%

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Updated: Jul 13, 2026Developer scaleThe operating scale of the game's developer.
Updated: Jul 13, 2026Publisher scaleThe operating scale of the game's publisher.
A separate publisher is listed for this release.
Search Google: Is UDONGEIN X self-published or published by Bar Holographic Otaku and 东游鉴?Publisher statusHow the game's publishing relationship is classified.
Search Google: How is UDONGEIN X and Bar Holographic Otaku and 东游鉴 funded?FundingThe known source of funding behind the game.
Search Google: Who controls the creative direction and IP for UDONGEIN X and Bar Holographic Otaku?Creative controlWho appears to retain creative control of the game.
Updated: Jul 13, 2026Release statusWhether and how the game has been released.
The game was released through a separate publisher.

Media

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About the Game

Lunarians Are Up to Something Again!

A small group of Moon Rabbits has crash landed in Gensokyo. They have been left on their own! It's up to Reisen to (reluctantly) rescue each one of her former comrades and beat some sense into Lunarians once and for all. Do your best, Udon-chan!

14 Unique and Engaging Boss Fights

Every Boss has a gimmick of their own and requires a different strategy! In addition to dodging bullets, you have to respect each Boss' different mechanics if you want to have a chance at winning.

Make Reisen Stronger!

You can invest Power Up items you get from Stages and Bosses into upgrades to make Reisen more powerful. This ranges anywhere from increasing max health to giving you the ability to erase entire screens worth of bullets in your path! Of course, you can ignore this system if you want to challenge yourself.

3 Difficulty Settings

Feel like the game is too hard? You can set the difficulty to Easy if you want a more traditional platformer experience with less bullets on screen. Alternatively you can choose Lunatic for a true test of skill and patience. DISCLAIMER: You have to beat the game at least once to unlock Lunatic difficulty. Changing a difficulty setting requires a reset of your current playthrough.

An Additional Mode

SURVIVAL is a Boss Rush mode where you can select different perks in between fights. It will get progressively harder, so stay sharp! Who knows, maybe if you get a big enough win streak, you might unlock something interesting...
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